Author Question: A researcher found a correlation of .40 between aptitude test scores and school achievement. What ... (Read 170 times)

humphriesbr@me.com

  • Hero Member
  • *****
  • Posts: 550
A researcher found a correlation of .40 between aptitude test scores and school achievement. What proportion of the variance in school achievement can be attributed to variables other than aptitude?
 
  a. .16 c. .60
  b. .40 d. .84

Question 2

How does replication of experiments contribute to external validity?
 
  What will be an ideal response?



InfiniteSteez

  • Sr. Member
  • ****
  • Posts: 340
Answer to Question 1

D

Answer to Question 2

If experiments are repeated and the outcome is the same, one has more confidence in generalizing the findings to other subjects and settings.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

For a complete list of videos, visit our video library